Optimal. Leaf size=72 \[ -96 \sqrt {a-a \cos (x)}+12 x^2 \sqrt {a-a \cos (x)}+48 x \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )-2 x^3 \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right ) \]
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Rubi [A]
time = 0.08, antiderivative size = 72, normalized size of antiderivative = 1.00, number of steps
used = 5, number of rules used = 3, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {3400, 3377,
2717} \begin {gather*} -2 x^3 \cot \left (\frac {x}{2}\right ) \sqrt {a-a \cos (x)}+12 x^2 \sqrt {a-a \cos (x)}-96 \sqrt {a-a \cos (x)}+48 x \cot \left (\frac {x}{2}\right ) \sqrt {a-a \cos (x)} \end {gather*}
Antiderivative was successfully verified.
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Rule 2717
Rule 3377
Rule 3400
Rubi steps
\begin {align*} \int x^3 \sqrt {a-a \cos (x)} \, dx &=\left (\sqrt {a-a \cos (x)} \csc \left (\frac {x}{2}\right )\right ) \int x^3 \sin \left (\frac {x}{2}\right ) \, dx\\ &=-2 x^3 \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )+\left (6 \sqrt {a-a \cos (x)} \csc \left (\frac {x}{2}\right )\right ) \int x^2 \cos \left (\frac {x}{2}\right ) \, dx\\ &=12 x^2 \sqrt {a-a \cos (x)}-2 x^3 \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )-\left (24 \sqrt {a-a \cos (x)} \csc \left (\frac {x}{2}\right )\right ) \int x \sin \left (\frac {x}{2}\right ) \, dx\\ &=12 x^2 \sqrt {a-a \cos (x)}+48 x \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )-2 x^3 \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )-\left (48 \sqrt {a-a \cos (x)} \csc \left (\frac {x}{2}\right )\right ) \int \cos \left (\frac {x}{2}\right ) \, dx\\ &=-96 \sqrt {a-a \cos (x)}+12 x^2 \sqrt {a-a \cos (x)}+48 x \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )-2 x^3 \sqrt {a-a \cos (x)} \cot \left (\frac {x}{2}\right )\\ \end {align*}
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Mathematica [A]
time = 0.04, size = 34, normalized size = 0.47 \begin {gather*} -2 \sqrt {a-a \cos (x)} \left (-6 \left (-8+x^2\right )+x \left (-24+x^2\right ) \cot \left (\frac {x}{2}\right )\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [C] Result contains complex when optimal does not.
time = 0.06, size = 86, normalized size = 1.19
method | result | size |
risch | \(-\frac {i \sqrt {2}\, \sqrt {-a \left ({\mathrm e}^{i x}-1\right )^{2} {\mathrm e}^{-i x}}\, \left (6 i x^{2} {\mathrm e}^{i x}+x^{3} {\mathrm e}^{i x}-6 i x^{2}+x^{3}-48 i {\mathrm e}^{i x}-24 x \,{\mathrm e}^{i x}+48 i-24 x \right )}{{\mathrm e}^{i x}-1}\) | \(86\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [B] Leaf count of result is larger than twice the leaf count of optimal. 129 vs.
\(2 (60) = 120\).
time = 0.53, size = 129, normalized size = 1.79 \begin {gather*} -{\left ({\left (6 \, \sqrt {2} x^{2} - 6 \, {\left (\sqrt {2} x^{2} - 8 \, \sqrt {2}\right )} \cos \left (x\right ) - {\left (\sqrt {2} x^{3} - 24 \, \sqrt {2} x\right )} \sin \left (x\right ) - 48 \, \sqrt {2}\right )} \cos \left (\frac {1}{2} \, \pi + \frac {1}{2} \, \arctan \left (\sin \left (x\right ), \cos \left (x\right )\right )\right ) + {\left (\sqrt {2} x^{3} + {\left (\sqrt {2} x^{3} - 24 \, \sqrt {2} x\right )} \cos \left (x\right ) - 6 \, {\left (\sqrt {2} x^{2} - 8 \, \sqrt {2}\right )} \sin \left (x\right ) - 24 \, \sqrt {2} x\right )} \sin \left (\frac {1}{2} \, \pi + \frac {1}{2} \, \arctan \left (\sin \left (x\right ), \cos \left (x\right )\right )\right )\right )} \sqrt {a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F(-2)]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Exception raised: TypeError} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int x^{3} \sqrt {- a \left (\cos {\left (x \right )} - 1\right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.42, size = 55, normalized size = 0.76 \begin {gather*} -2 \, \sqrt {2} {\left ({\left (x^{3} \mathrm {sgn}\left (\sin \left (\frac {1}{2} \, x\right )\right ) - 24 \, x \mathrm {sgn}\left (\sin \left (\frac {1}{2} \, x\right )\right )\right )} \cos \left (\frac {1}{2} \, x\right ) - 6 \, {\left (x^{2} \mathrm {sgn}\left (\sin \left (\frac {1}{2} \, x\right )\right ) - 8 \, \mathrm {sgn}\left (\sin \left (\frac {1}{2} \, x\right )\right )\right )} \sin \left (\frac {1}{2} \, x\right )\right )} \sqrt {a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.43, size = 92, normalized size = 1.28 \begin {gather*} \frac {2\,\sqrt {a}\,\sqrt {1-\cos \left (x\right )}\,\left (24\,x+\cos \left (x\right )\,48{}\mathrm {i}-48\,\sin \left (x\right )-x^2\,\cos \left (x\right )\,6{}\mathrm {i}-x^3\,\cos \left (x\right )+6\,x^2\,\sin \left (x\right )-x^3\,\sin \left (x\right )\,1{}\mathrm {i}+24\,x\,\cos \left (x\right )+x\,\sin \left (x\right )\,24{}\mathrm {i}+x^2\,6{}\mathrm {i}-x^3-48{}\mathrm {i}\right )}{\sin \left (x\right )-\cos \left (x\right )\,1{}\mathrm {i}+1{}\mathrm {i}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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